RANKING · 2000 CENSUS · 63 SHOWN OF 63

Oldest by median age, Colorado counties · 2000

Colorado counties ranked by median age of residents (2000 ACS). This list covers the 63 counties in Colorado that qualify, ranked against each other statewide. The median across all 63 is 37.4.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 1990

01Mineral County, COCO91045.0+20%

02Custer County, COCO5,59044.9+14%

03Hinsdale County, COCO75343.9+13%

04San Juan County, COCO81343.7+30%

05Ouray County, COCO5,26543.4+9%

06Sedgwick County, COCO2,24743.2+6%

07Baca County, COCO3,34742.9+10%

08Dolores County, COCO2,46642.4+16%

09Delta County, COCO32,17842.3+3%

10Costilla County, COCO3,67942.1+19%

11Chaffee County, COCO20,83141.8+12%

12Huerfano County, COCO7,01141.7+6%

13Las Animas County, COCO14,39140.9+8%

14Archuleta County, COCO14,30640.8+15%

15Jackson County, COCO1,21140.5+14%

16Clear Creek County, COCO8,99440.2+12%

17Washington County, COCO4,73240.2+8%

18Park County, COCO18,31440.0+12%

19Phillips County, COCO4,42039.8+3%

20Kiowa County, COCO1,41239.7+7%

21Teller County, COCO24,75639.4+14%

22Montrose County, COCO44,59138.8+4%

23Fremont County, COCO50,03938.8+3%

24Pitkin County, COCO16,62538.4+10%

25Gilpin County, COCO6,07338.3+6%

26Mesa County, COCO162,84538.1+10%

27Montezuma County, COCO26,67838.0+13%

28Cheyenne County, COCO1,71337.9+19%

29Lincoln County, COCO5,64537.8+3%

30Otero County, COCO17,68337.7+8%

31Rio Blanco County, COCO6,68337.5+16%

32Kit Carson County, COCO7,06937.4+7%

33Bent County, COCO5,71637.3−9%

34Rio Grande County, COCO11,08737.3+10%

35Yuma County, COCO9,89637.3+4%

36Elbert County, COCO30,53437.2+11%

37Grand County, COCO16,49636.9+11%

38Saguache County, COCO6,73236.9+17%

39Jefferson County, COCO580,45136.8+10%

40Pueblo County, COCO169,27736.7+6%

41Crowley County, COCO5,67736.6+7%

42Logan County, COCO20,65436.5+5%

43La Plata County, COCO56,89835.6+12%

44Moffat County, COCO13,12235.4+11%

45Routt County, COCO25,32935.0+8%

46Arapahoe County, COCO673,82034.5+6%

47Conejos County, COCO7,52934.2+9%

48Garfield County, COCO63,47434.2+4%

49San Miguel County, COCO7,75334.2+3%

50Douglas County, COCO399,39633.7+4%

51Morgan County, COCO30,30633.5+3%

52Boulder County, COCO328,56033.4+6%

53Larimer County, COCO377,29233.2+6%

54Denver County, COCO740,61333.1−3%

55El Paso County, COCO757,04033.0+9%

56Prowers County, COCO11,88432.4+1%

57Adams County, COCO554,66831.4+2%

58Eagle County, COCO54,29131.2+2%

59Weld County, COCO378,42630.9+1%

60Summit County, COCO31,51730.80%

61Alamosa County, COCO16,68830.6+8%

62Lake County, COCO7,55230.5−2%

63Gunnison County, COCO17,43930.4+7%

SHOWING 1–63 OF 63

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS